An encyclopædia of agriculture [electronic An encyclopædia of agriculture [electronic resource] : comprising the theory and practice of the valuation, transfer, laying out, improvement, and management of landed property, and the cultivation and economy of the animal and vegetable productions of agriculture, including all the latest improvements, a general history of agriculture in all countries, and a statistical view of its present state, with suggestions for its future progress in the British Isles encyclopdiaofa01loud Year: 1831 406 SCIENCE OF AGRICULTURE, Tart II. and the operation is rep
An encyclopædia of agriculture [electronic An encyclopædia of agriculture [electronic resource] : comprising the theory and practice of the valuation, transfer, laying out, improvement, and management of landed property, and the cultivation and economy of the animal and vegetable productions of agriculture, including all the latest improvements, a general history of agriculture in all countries, and a statistical view of its present state, with suggestions for its future progress in the British Isles encyclopdiaofa01loud Year: 1831 406 SCIENCE OF AGRICULTURE, Tart II. and the operation is repeated at intervals till the crop is thoroughly cleaned. The centre hoe is stationary, and the right and left expand and contract in the same manner as in the horse hoe. The depth is regulated by the wheel at the point of the beam, and may be varied from one to six inches. The hoes cut the bottom of the space between the drills completely, while the harrow following, pulverises the soil, and rakes out the weeds. Should circumstances require, the wings of the harrow may be taken oft', and the hoes only used ; or the hoes displaced, and the harrow only employed. This imple- ment was invented by the late Mr. Wilkie of Uddingston, near Glasgow, in 1820, and is the first instance 'of the form being adopted in hoes or prongs. Afterwards Mr. Finlayson applied this form to his harrow; and subsequently Mr. Wilkie, junioi, of Uddingston, to his admirable brake (2655.) 2667. Finlayson's self-cleaning horse hoe and drill harrow {fig. 331.) is an excellent implement, and as a harrow is preferable to that of Wilkie (2665.), from whose imple- ment it differs chiefly in being more a harrow than a hoe, and in every prong being calculated for cleaning itself. 2668. Wilkie s horse hoe and drill plough is considered an effective implement. The mould-boards are taken off when used as a horse hoe, and the hoes taken off and the mould-boards replaced when earthing up the crops ; thus comb
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